Polypropylene (PP)Polypropylene bottles are a contact clear, so even though the bottle appears to be cloudy, when the bottle is filled your product is easily seen. We carry several spice bottles in PP for the clarity. Another benefit of Polypropylene bottles is that they are able to withstand high temperatures, up near 240° F), making bottles and containers made from PP ideal for hot-filling. We stock polypropylene bottles for sauces and other items that may need to be hot-filled. Polypropylene is less suitable for freezing temperatures where it can become brittle; however there are additives that can be added to polypropylene to make it able to withstand freezing temperatures and we stock a wide range of freezer grade polypropylene tubs. Read: Choosing the Right Plastic Container for Your Product